Yokogawa ADMAG AXR Bedienungsanleitung PDF herunterladen (Seite 19)

<3. INSTALLATION>

3-7

IM 01E30D01-01EN

Table 3.3.3 Wafer Type Tightening Torque Values for Metal Piping and Permeable Fluids

TighteningtorquevaluesforPFAliningtype(N-m/{kgf-cm}/[in-lbf])

Gasket types

ithinowtube

No gasket (standard)

Gasket types

for user’s



ange

PTFE-sheathed non-asbestos gasket (optional codes BCF and BSF), or the equivalent in hardness

Flange ratings

Size

mm (inch)

JIS 10K, ANSI Class 150, and DIN PN10 JIS 20K, ANSI Class 300, and DIN PN16 DIN PN40

25 (1.0) 34.9 to 40.1 / {355.9 to 408.9} / [308.9 to 354.9] 35.2 to 40.1 / {358.9 to 408.9} / [311.5 to 354.9] 32.3 to 37.1 / {329.4 to 378.3} / [285.9 to 328.4]

40 (1.5) 53.5 to 61.5 / {545.5 to 627.1} / [473.5 to 544.3] 54.2 to 61.5 / {552.7 to 627.1} / [479.7 to 544.3] 56.4 to 61.5 / {575.1 to 627.1} / [499.2 to 544.3]

3.3.2 Nominal Diameter 50 mm (2.0 in.) to

200 mm (8.0 in.), Wafer Type

IMPORTANT

Useboltsandnutsincompliancewiththeange

ratings. When stud-type through-bolts are used,

be sure the outside diameter of the shank is

smaller than that of the thread ridge. Be sure to

choose a gasket with inner and outer diameters

that does not protrude inside the piping (refer to

Table 3.3.9). If the inner diameter of the gasket is

too large, or outer diameter of the gasket is too

small,uidleakagemayresult.

(1) Mounting Direction

Mounttheowmetersothattheowdirectionofthe

uidtobemeasuredisinlinewiththedirectionof

thearrowmarkontheowmeter.

IMPORTANT

If it is impossible to match the direction of

the arrow mark, the direction of the electrical

connection can be changed. Refer to Section

10.1 to do this properly.

Incasetheuidbeingmeasuredowsagainst

the arrow direction, refer to this parameter J20:

Flow Direction in this user’s manual.

(2) Mounting Centering Devices

Tomaintainconcentricityoftheowmeterwiththe

pipes, install centering devices. From the process

piping side, pass two through-bolts through the

four centering devices (two for each bolt) and

the adjacent two holes (the lower two holes for

orizontalmounting)ofbothoftheanges(refer

to Figure 3.3.2). Use the appropriate centering

devices according to the nominal diameter and the

angeratings.Thecenteringdevicesareengraved

with an identifying character. Use the appropriate

oneswhichmeettherequiredspecicationsby

referring to Tables 3.3.7.

(3) Positioning the Flowmeter

PositiontheowmetersothattheMini-angesand

the centering devices come in close contact with

each other. Be careful to prevent the four centering

devices from coming into contact with the housing.

If stud-type through-bolts are used, position them in

such a way that the four centering devices come in

contact with the bolt threads (refer to Figure 3.3.2).

Pass the other through-bolts through from the

process piping side.

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